PC0E-0940

Standard accessories❶ Lithium ion rechargeable battery unit and AC
adapter for charging①Portable Gas Detectors②❷ Dry battery unit and AA alkaline batteries (× 3)

or*1

Model RX-8000/RX-8500/RX-8700❸ Gas sampling rod and gas sampling tube
❹ Filter cylinder and connecting tube
❺ Filter cylinder retaining belts

ATEX

③

IECEx

④

TIIS (Japan Ex)❻ Shoulder strap

CE marking
MED❼ CO2 removal filter and retaining belt*2

RX-8000

ABS Type Approval *RX-8500/RX8700 only
JG (Japan Government Type Approval)
NK (Class NK Type Approval) *RX-8500/RX8700 only

RX-8500/RX-8700⑤⑥⑦*1: The dry battery unit is selectable as standard onlywith the RX-8000.
*2: Provided only with the RX-8500

Optional accessories (sold separately)
Stores the main unit, replacement batteries, andsampling tubes together for easy transport.

A large-capacity ship-use
aluminum storage caseis also available.

Aluminum storage caseMarine spare parts box

Approx. 375 mm (W) × 265 mm (H) × 245 mm (D)Approx. 500 mm (W) × 305 mm (H) × 275 mm (D)Waist belt and waist belt attachment

RX-8000 carrying case

Water trap

Sampling tube with float (30 m)

Sampling tube with weight (30 m)

Protective film

Filters (for maintenance/replacement)

Data logger management program

Using both the shoulder strap
and waist belt allows easy
movement and hands-free work.

● Lithium ion rechargeable battery unit

● Absorbent cotton● AC adapter for charging● Demand flow valve● Dry battery unit

● Calibration gas cans

● AA alkaline batteries (× 3)● Gas sampling bag set● Sampling rod holder● H2S calibration gas set(CK-82)*RX-8000 only

[Target gases]◆RX-8000HC or CH4: 0 - 100.0 %LEL/Up to 100.0 vol%O2 :0 - 25.0 vol% (Service range 25.1 - 40.0 vol%)◆RX-8500
CH4: 0 - 100.0 %LEL/5 - 100.0 vol%O2: 0 - 25.0 vol% (Service range 25.1 - 40.0 vol%)CO: 0 - 1,000 ppm
CO2: 0 - 20.0 vol%Distributed by:◆RX-8700
HC: 0 - 100.0 %LEL/2 - 100.0 vol%O2: 0 - 25.0 vol% (Service range 25.1 - 40.0 vol%)H2S: Low concentration measurement mode: 0 - 30.0 ppm

2 -7-6 Azusawa, Itabashi-ku, Tokyo 174 - 8744, Japan

Phone : +81-3-3966-1113
Telefax : +81-3-3558-9110
E-mail : intdept@rikenkeiki.co.jp
Web : https://www.rikenkeiki.co.jp/english(Service range 30.5 - 100.0 ppm)

High concentration measurement mode: 0 - 1,000 ppm※ The contents described in this catalog are

subject to change without notice according
to the performance improvement.

*RX-8000 only

PC0E-0940-201100

Features

Specifications

Capable of measuring combustible gas (HC or CH4) from low to high concentrations
The easy-to-use auto range switching feature automatically switches to the vol% range if the combustible gas concentration
measured exceeds 100 %LEL.

RX-8000

Infrared sensor maintains high accuracy even in inert gas or N2 atmospheres

Features infrared type combustible gas sensor unaffected by oxygen concentrations during measurement. Its high selectivity
also means it’s virtually unaffected by interference from other coexisting gases or water vapor.

Target gases

Combustible gas (HC*1 or CH4)

Oxygen (O2)

Measuring principles

Non-dispersive infrared type

Galvanic cell typeMeasurement range(Service range)

0 - 100.0 %LEL/Up to 100.0 vol%*2

0 - 25.0 vol% (25.1 - 40.0 vol%)1 digit

0.5 %LEL (0 - 100.0 %LEL)/0.5 vol% (Up to 100.0 vol%)0.1 vol%

Pump suction type (Minimum suction flow rate: 0.75 L/min)

Measuring method

Intrinsically safe explosion-proof construction
The Ex ia IIC T4 X explosion-proof rating allows use even in Zone 0 hazardous areas. Protection rating equivalent to IP67.

Complies with SOLAS convention amendments

Meets the requirements of amended SOLAS convention for portable gas detectors carried by vessels.
① Capable of measuring combustible gas (HC or CH4) and oxygen (O2) simultaneously② Intrinsically safe explosion-proof construction ③ Continuous operation for at least 10 hours

Applications
Concentration monitoring during gas
purging work on gas facilities

Able to measure HC/CH4 with high accuracy even in inert gas
or N2 atmospheres

Ensuring safety before gas
elimination and tank cleaning work

RX-8500

On land

Display

LCD digital (7-segment + sign + bar meter)

Fault alarms

System abnormality, sensor abnormality, low battery voltage, calibration failure, low flow rate, clock abnormality

Fault alarm indications

Lamp flashing, intermittent buzzer sounding, detail display

Power source*3

Lithium ion battery unit or dry battery unit (AA alkaline batteries × 3)

Continuous operatingtime
Operating temperature/humidity range

Lithium ion battery unit: Approx. 15 hours (with full charge, at 25 °C, no alarm, no lighting)
Dry battery unit:
Approx. 10 hours (with new batteries, at 25 °C, no alarm, no lighting)External dimensions

Approx. 154 mm (W) × 81 mm (H) × 127 mm (D) (excluding projections)

WeightApprox. 1.1 kg (with lithium ion battery unit), approx. 1.0 kg (with dry battery unit)-20 °C - +50 °C (no sudden changes), up to 95 %RH (no condensation)

Protection level

IP67 equivalentExplosion-proof

Intrinsically safe explosion-proof construction (Ex ia IIC T4 X)

Certifications

TIIS explosion-proof certified, ATEX explosion-proof certified, IECEx certified, CE marking compliant, MED compliant, JG type approved

Functions*4

LCD backlight, data logger, peak display, log data display, pump shutdown

A single unit supports all operations within LNG vessels
Target gases

Combustible gas (CH4)

Oxygen (O2)

Carbon monoxide (CO)Carbon dioxide (CO2)

Measuring principles

Non-dispersive infrared type

Galvanic cell type

Electrochemical typeNon-dispersive infrared typeMeasurement range(Service range)

0 - 100.0 %LEL/
5 - 100.0 vol%*2

0 - 25.0 vol%(25.1 - 40.0 vol%)0 - 1,000 ppm

0 - 20.0 vol%1 digit

0.5 %LEL (0 - 100.0 %LEL)
0.5 vol% (5.0 - 100.0 vol%)1 ppm

0.01 vol% (0 - 2.00 vol%)0.05 vol% (2.00 - 5.00 vol%)0.1 vol% (5.00 - 20.0 vol%)Pump suction type (Minimum suction flow rate: 0.75 L/min)Measuring method

HC CH4

O2

HC CH4

Measuring various gas concentrations
inside cargo tanks

O2

Measuring various gas
concentrations inside ballast tanks

RX-8700

On ships

Display

LCD digital (7-segment + sign + bar meter)

Fault alarms

System abnormality, sensor abnormality, low battery voltage, calibration failure, low flow rate, clock abnormality

Fault alarm indications

Lamp flashing, intermittent buzzer sounding, detail display

Power source*3

Lithium ion battery unit or dry battery unit (AA alkaline batteries × 3) (option)

Continuous operating
timeLithium ion battery unit: Approx. 15 hours (with full charge, at 25 °C, no alarm, no lighting)
Dry battery unit:
Approx. 8 hours (with new batteries, at 25 °C, no alarm, no lighting)Operating temperature/humidity range-20 °C - +50 °C (no sudden changes), up to 95 %RH (no condensation)

External dimensions

Approx. 154 mm (W) × 81 mm (H) × 163 mm (D) (excluding projections)

WeightApprox. 1.2 kg (with lithium ion battery unit), approx. 1.1 kg (with dry battery unit)

Protection level

IP67 equivalent

Explosion-proof

Intrinsically safe explosion-proof construction (Ex ia IIC T4 X)

Certifications

TIIS explosion-proof certified, ATEX explosion-proof certified, IECEx certified, CE marking compliant
JG type approved, NK type approved, ABS type approved, MED (pending)

Functions*4

LCD backlight, data logger, peak display, log data display, pump shutdown

Capable of high-concentration H2S measurement(Measurement mode switching with one push of a button)
Target gases

Combustible gas (HC)*1

Oxygen (O2)

Measuring principles

Non-dispersive infrared type

Galvanic cell typeMeasurement range(Service range)

0 - 100.0 %LEL/
2 - 100.0 vol%*20 to 25.0 vol%(25.1 - 40.0 vol%)Low concentration:
0 - 30.0 ppm(30.5 - 100.0 ppm)

High concentration:
0 - 1,000 ppm

1 digit

0.5 %LEL (0 - 100.0 %LEL)
0.5 vol% (5.0 - 100.0 vol%)0.1 vol%

0.5 ppm

1 ppm

Measuring method

HC CH4O2 CO2 H2S
O2CH4● Monitoring performance of inert gas

emitting equipment[HC, CH4, O2]● Measuring residual gas concentrations

inside tanks during repair work [CO2, CO]

HCH2S● Checking safety before entering

enclosed spaces[H2S, O2]

0.1 vol%Hydrogen sulfide (H2S)
Electrochemical type

Pump suction type (Minimum suction flow rate: 0.75 L/min)

Display

LCD digital (7-segment + sign + bar meter)

Fault alarms

System abnormality, sensor abnormality, low battery voltage, calibration failure, low flow rate, clock abnormality

Fault alarm indications

Lamp flashing, intermittent buzzer sounding, detail display

Power source*3

Lithium ion battery unit or dry battery unit (AA alkaline batteries × 3) (option)

Continuous operatingtime

Lithium ion battery unit: Approx. 15 hours (with full charge, at 25 °C, no alarm, no lighting)
Dry battery unit:
Approx. 8 hours (with new batteries, at 25 °C, no alarm, no lighting)Operating temperature/humidity range-20 °C - +50 °C (no sudden changes), up to 95 %RH (no condensation)

External dimensions

Approx. 154 mm (W) × 81 mm (H) × 163 mm (D) (excluding projections)

WeightApprox. 1.3 kg (with lithium ion battery unit), approx. 1.2 kg (with dry battery unit)

Protection level

IP67 equivalent

Explosion-proofIntrinsically safe explosion-proof construction (Ex ia IIC T4 X)

Certifications

TIIS explosion-proof certified, ATEX explosion-proof certified, IECEx certified, CE marking compliant
JG type approved, NK type approved, ABS type approved, MED (pending)

Functions*4

LCD backlight, data logger, peak display, log data display, pump shutdown*1: HC calibration gas is isobutane. Contact Riken Keiki if you intend to measure a gas other than the calibration gas. *2: This product automatically switches measurement ranges. The product willautomatically switch to the vol% range if the combustible gas concentration measured exceeds 100 %LEL. *3: The RX-8500 and RX-8700 standard versions use the lithium ion battery unit. The dry battery
version is optional. For the dry battery version, use dry batteries specified in the certificate of conformity for electrical equipment used in potentially explosive atmospheres to meet explosion-proof
performance requirements. *4: Contact Riken Keiki if you require the optional gas alarm function.